Depth-limiting press-in tool for medical drill bit

Abstract

The utility model relates to a medical drill bit depth-limiting press-in tool which comprises an outer sleeve and an inner core rod, a through hole penetrating through the axial direction of the outer sleeve is formed in the outer sleeve, and a drill bit rod and a sleeve of a medical drill bit can penetrate into the through hole from one end of the outer sleeve till the end, facing a handle of the medical drill bit, of the outer sleeve abuts against the handle. The inner core rod can penetrate into the through hole from one end of the handle of the outer sleeve until the end, away from the handle, of the inner core rod is flush with the outer sleeve, a core hole penetrating through the axial direction of the inner core rod is formed in the inner core rod, and the tip end of the drill bit rod penetrates into the core hole until the end, facing the handle, of the inner core rod abuts against the shoulder of the drill bit rod. According to the utility model, the depth of the drill bit rod assembled in the handle can be accurately controlled during assembly, the processing difficulty of the medical drill bit is effectively reduced, the assembly efficiency is improved, and meanwhile, the qualification rate of finished medical drill bits is ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of medical instruments, and particularly relates to a medical drill depth-limiting press-in tool. BACKGROUND

[0002] When processing and assembling the medical drill, the one end of the drill rod needs to be assembled into the assembly hole of the handle, and the assembly depth of the drill rod also affects the qualified rate of the finished product, that is, the medical drill of the finished product needs to control the size a between the front end of the handle (that is, the one end towards the tip of the drill rod) and the upper shoulder of the drill rod in the qualified size range.

[0003] In the existing processing and assembling mode, the tip of the drill rod is generally clamped or abutted by using an auxiliary tool, and the tip is pushed into the assembly hole of the handle, which not only causes damage to the tip and makes the tip appear worn or deformed, but also cannot accurately control the assembly precision of the size a of the drill rod and the handle, directly increasing the processing difficulty, reducing the processing efficiency and the qualified rate of the finished product. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a medical drill depth-limiting press-in tool to solve the problem of low processing efficiency of the medical drill.

[0005] The medical drill depth-limiting press-in tool of the utility model is implemented as follows:

[0006] A medical drill depth-limiting press-in tool comprises

[0007] An outer sleeve is internally provided with a through hole penetrating through the axial direction thereof, the drill rod of the medical drill and the sleeve can be inserted into the through hole from one end of the outer sleeve, and the one end of the outer sleeve towards the handle of the medical drill abuts against the handle;

[0008] An inner core rod can be inserted into the through hole from one end of the handle of the outer sleeve, and the one end of the inner core rod away from the handle is flush with the outer sleeve, the inner core rod is internally provided with a core hole penetrating through the axial direction thereof, the tip of the drill rod is inserted into the core hole, and the one end of the inner core rod towards the handle abuts against the shoulder of the drill rod.

[0009] Further, the inner core rod comprises a body segment and a necked segment with an outer diameter smaller than the body segment, and the tip of the drill rod is inserted into the core hole from the end of the necked segment.

[0010] Further, the sleeve is sleeved on the outside of the drill rod, and the necked segment is inserted into the sleeve from the one end of the sleeve away from the handle and is sleeved on the outside of the drill rod.

[0011] Further, the outer diameter of the sleeve is equal to the outer diameter of the body segment of the inner core rod, and both of them match the inner diameter of the through hole of the outer sleeve.

[0012] Furthermore, the drill bit rod includes a mounting section close to the handle and a drill bit section close to the tip, and the shoulder is located between the mounting section and the drill bit section, and the drill bit section penetrates into the core hole;

[0013] The outer diameter of the drill bit section matches the inner diameter of the core hole.

[0014] Furthermore, the inner diameter of the sleeve includes a large-diameter section and a small-diameter section, the mounting section of the drill bit rod is located in the small-diameter section, and the outer diameter of the mounting section matches the inner diameter of the small-diameter section;

[0015] The shoulder of the drill rod and the necking section of the inner core rod are located in the large-diameter section, and the outer diameters of the shoulder and the necking section respectively match the inner diameter of the large-diameter section.

[0016] After adopting the above technical solution, the utility model has the following beneficial effects:

[0017] The utility model can accurately control the depth of the drill rod assembled into the handle during assembly through the cooperation of the outer sleeve and the inner core rod, so as to ensure the assembly accuracy, effectively reduce the assembly difficulty of the medical drill bit, improve the processing efficiency, and ensure the qualified rate of the finished medical drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is an axial cross-sectional view of a medical drill bit with a limited depth press-fit tooling using a preferred embodiment of the utility model;

[0020] Figure 2 This is an axial cross-sectional view of a sleeve of a tooling medical drill bit with a limited depth press-fitting of a medical drill bit according to a preferred embodiment of the present utility model;

[0021] Figure 3 This is an axial cross-sectional view of the handle of a medical drill bit with a limited depth press-fitting tooling using a preferred embodiment of the utility model;

[0022] Figure 4 This is a schematic structural diagram of the cooperation between the medical drill bit depth limiting press-in tooling and the medical drill bit in a preferred embodiment of the utility model;

[0023] Figure 5 This is an axial cross-sectional view of the medical drill bit depth limiting press-in tooling and the medical drill bit in the preferred embodiment of the present utility model;

[0024] Figure 6 This is an axial cross-sectional view of an inner core rod of a medical drill bit depth-limiting press-fitting tool in a preferred embodiment of the present invention;

[0025] In the figure: outer sleeve 1, through hole 11, inner core rod 2, body section 21, necking section 22, core hole 23, drill rod 31, shoulder 311, mounting section 312, drill section 313, tip 314, sleeve 32, large aperture section 321, small aperture section 322, handle 33, assembly hole 331, countersunk hole 332. DETAILED DESCRIPTION

[0026] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0028] like Figure 1-3 As shown, the medical drill bit applicable to the present invention includes a handle 33, a drill rod 31 and a sleeve 32. The sleeve 32 is sleeved on the outside of the drill rod 31, and the ends of both facing the handle 33 are assembled into the inner hole of the handle 33, that is, the drill rod 31 is assembled into the assembly hole 331 of the handle 33, and the sleeve 32 is assembled into the countersunk hole 332 of the handle 33. At this time, it is necessary to control the depth of the drill rod 31 inserted into the assembly hole 331 of the drill rod 31 to control the size of dimension a, thereby ensuring that dimension a is within the qualified size range.

[0029] like Figure 4-6 As shown, a medical drill bit depth-limiting press-in tooling includes an outer sleeve 1 and an inner core rod 2. The outer sleeve 1 is provided with a through hole 11 running through the outer sleeve 1 in its axial direction. The drill rod 31 and the sleeve 32 of the medical drill bit can be inserted into the through hole 11 from one end of the outer sleeve 1 until the end of the outer sleeve 1 facing the medical drill bit handle 33 abuts against the handle 33; the inner core rod 2 can be inserted into the through hole 11 from one end of the outer sleeve 1 handle 33 until the end of the inner core rod 2 away from the handle 33 is flush with the outer sleeve 1. A core hole 23 running through the inner core rod 2 in its axial direction is provided. The tip 314 of the drill rod 31 is inserted into the core hole 23 until the end of the inner core rod 2 facing the handle 33 abuts against the shoulder 311 of the drill rod 31.

[0030] The total length of the outer sleeve 1 and the inner core rod 2 can be selected according to the requirement of dimension a, that is, the length difference between the outer sleeve 1 and the inner core rod 2 is dimension a.

[0031] During assembly, the outer sleeve 1 is used to position the handle 33, and the inner core rod 2 is used to push the drill rod 31 inward to position the insertion depth of the drill rod 31. The two cooperate with each other and when the outer sleeve 1 and the end of the inner core rod 2 facing away from the handle 33 are flush, it indicates that the drill rod 31 is assembled in place, and the dimension a at this time is within the qualified size range.

[0032] When the inner core rod 2 is matched with the drill rod 31, its end facing the handle 33 needs to extend into the sleeve 32. In order to achieve the matching of the inner core rod 2 and the sleeve 32, the inner core rod 2 includes a main body section 21 and a necking section 22 with an outer diameter smaller than the main body section 21. The tip 314 of the drill rod 31 penetrates into the core hole 23 from the end of the necking section 22.

[0033] Specifically, the sleeve 32 is sleeved on the outside of the drill rod 31 , and the necked section 22 penetrates into the sleeve 32 from the end of the sleeve 32 away from the handle 33 and is sleeved on the outside of the drill rod 31 .

[0034] In order to ensure the matching accuracy between the sleeve 32, the inner core rod 2 and the outer sleeve 1 and avoid radial deviation, the outer diameter of the sleeve 32 is equal to the outer diameter of the main body section 21 of the inner core rod 2, and both are matched with the inner diameter of the through hole 11 of the outer sleeve 1.

[0035] In order to use the inner core rod 2 to push the drill bit rod 31 so that it can be installed into the assembly hole 331 of the handle 33, the drill bit rod 31 includes a mounting section 312 close to the side where the handle 33 is located, and a drill bit section 313 close to the side where the tip 314 is located, and the shoulder 311 is located between the mounting section 312 and the drill bit section 313, and the drill bit section 313 penetrates into the core hole 23.

[0036] In order to ensure the matching accuracy between the drill rod 31 and the inner core rod 2 , the outer diameter of the drill segment 313 matches the inner diameter of the core hole 23 .

[0037] In order to ensure the matching accuracy between the sleeve 32 and the drill bit rod 31, the inner diameter of the sleeve 32 includes a large aperture section 321 and a small aperture section 322, the mounting section 312 of the drill bit rod 31 is located in the small aperture section 322, and the outer diameter of the mounting section 312 matches the inner diameter of the small aperture section 322.

[0038] At the same time, in order to ensure the matching accuracy between the shoulder 311 of the drill bit rod 31 and the necking section 22 of the inner core rod 2 and the sleeve 32, the shoulder 311 of the drill bit rod 31 and the necking section 22 of the inner core rod 2 are located in the large aperture section 321, and the outer diameter of the shoulder 311 and the outer diameter of the necking section 22 are respectively matched with the inner diameter of the large aperture section 321.

[0039] In the assembly of the medical drill, the sleeve 32 is first sleeved on the drill, and one end of the sleeve 32 is assembled into the counterbore 332 of the handle 33, then the outer sleeve 1 is sleeved outside the sleeve 32 and abuts against the handle 33 at the end thereof, then the inner core rod 2 is assembled into the through hole 11 and sleeved on the drill rod 31, at this time, the inner core rod 2 is pushed inward, and through the cooperation of the inner core rod 2 and the shoulder 311 of the drill rod 31, the drill rod 31 can be pushed by the inner core rod 2 to move into the assembly hole 331 of the handle 33, when the end of the inner core rod 2 away from the handle 33 is flush with the outer sleeve 1, it indicates that the drill rod 31 is assembled in place, at this time, the outer sleeve 1 and the inner core rod 2 can be removed.

[0040] The utility model discloses the cooperation of outer sleeve 1 and inner core rod 2 can realize the positioning of handle 33 and drill rod 31 both when the medical drill is assembled, thereby accurately control the depth of drill rod 31 assembly handle 33, guarantee the qualified rate of medical drill finished product.

[0041] Through the above description, the related staff can make various changes and modifications without deviating from the technical idea of the utility model. The technical scope of the utility model is not limited to the content in the specification, and must be determined according to the scope of claims.

Claims

1. A medical drill bit depth limiter press-in tool, characterized in that: include The outer sleeve (1) is provided with a through hole (11) extending axially therethrough, and the drill rod (31) and sleeve (32) of the medical drill can be inserted into the through hole (11) from one end of the outer sleeve (1) until the end of the outer sleeve (1) facing the medical drill handle (33) abuts against the handle (33); An inner core rod (2) is capable of passing through the through hole (11) from one end of the handle (33) of the outer sleeve (1) until the end of the inner core rod (2) away from the handle (33) is flush with the outer sleeve (1); a core hole (23) is provided in the inner core rod (2) running through the inner core rod (2) in its axial direction, and the tip (314) of the drill rod (31) passes through the core hole (23) until the end of the inner core rod (2) facing the handle (33) abuts against the shoulder (311) of the drill rod (31).

2. The medical drill bit depth limiting press-in tool according to claim 1, characterized in that: The inner core rod (2) comprises a main body section (21) and a necking section (22) having an outer diameter smaller than that of the main body section (21); the tip (314) of the drill rod (31) penetrates into the core hole (23) from the end of the necking section (22).

3. The medical drill bit depth limiting press-in tool according to claim 2, characterized in that: The sleeve (32) is sleeved on the outside of the drill rod (31), and the necked section (22) penetrates into the sleeve (32) from the end of the sleeve (32) away from the handle (33) and is sleeved on the outside of the drill rod (31).

4. The medical drill bit depth limiting press-in tool according to claim 2, characterized in that: The outer diameter of the sleeve (32) is equal to the outer diameter of the body section (21) of the inner core rod (2), and both are matched with the inner diameter of the through hole (11) of the outer sleeve (1).

5. The medical drill bit depth limiting press-in tool according to claim 2, characterized in that: The drill bit rod (31) includes a mounting section (312) close to the side where the handle (33) is located, and a drill bit section (313) close to the side where the tip (314) is located, and the shoulder (311) is located between the mounting section (312) and the drill bit section (313), and the drill bit section (313) penetrates into the core hole (23); The outer diameter of the drill segment (313) matches the inner diameter of the core hole (23).

6. The medical drill bit depth limiting press-in tool according to claim 5, characterized in that: The inner diameter of the sleeve (32) includes a large-diameter section (321) and a small-diameter section (322); the mounting section (312) of the drill bit rod (31) is located in the small-diameter section (322); and the outer diameter of the mounting section (312) matches the inner diameter of the small-diameter section (322); The shoulder (311) of the drill rod (31) and the necking section (22) of the inner core rod (2) are located within the large-diameter section (321), and the outer diameters of the shoulder (311) and the necking section (22) respectively match the inner diameter of the large-diameter section (321).

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